Swapping CPU's and hard drives on laptops

Hello!

I wanted to swap the CPU and the hard drive from a Dell Inspiron 5150 laptop into a Compaq Presario R3220US laptop (specs listed below). This would provide me with a laptop with a faster CPU, better display, and larger hard drive in the Compaq, and (hopefully) a fully functional Dell laptop for my daughter to use. I've done component swaps on desktops before, but laptops are new territory - a place where I'm not sure I have small enough fingers.

Two questions still remain for me:

(1) The 3.2 Ghz P4 processor from the Dell laptop has hyperthreading capability, where the 2.8 GHz P4 from the Compaq does not. What are the compatability concerns (i.e., motherboard, BIOS) - are they prohibitive?
(2) Any controller issues with switching a 5400 rpm hard drive into a system with a 4200 rpm drive (and vice versa)?

The bottom line is that when all is said and done, I'd like to have a reasonable chance of having two fully-functional laptops. I just want to redistribute the firepower a bit.

Any help/caveats you can provide would be most appreciated.

Much thanks -- barbarosa


Dell Inspirion specs: (OS: Windows XP Home):
1 M3315 PROCESSOR, 80532, 3.20, 512, FLIP CLIP PIN GRID ARRAY, Hyperthreading
1 M3821 BASE (ASSEMBLY OR GROUP), NOTEBOOK, 3.2, PENTIUM 4 NORTHWOOD, 15S+, 5150, HYT
1 5X321 MODULE, SOFTWARE, WXPHSP1, ENGLAND/ENGLISH, INSPIRON, DELL AMERICAS ORGANIZATION
1 W0995 MODULE, DUAL IN-LINE MEMORY MODULE, 512, 333MHZ, 256X2
1 N1084 MODULE, HARD DRIVE, 30GB, SMALL FORM FACTOR, 4.2K, Fujitsu Vesta-40, ABACUS
1 D2867 MODULE, CARD (CIRCUIT), GRAPHICS, 32MB, NV34, I5150
1 0G263 MODULE, LIQUID CRYSTAL DISPLAY, W/BASE, SUPER EXTENDED GRAPHICS ARRAY PLUS, C600
1 5W394 MODULE, INFORMATION, MODEM, 56K, MODEM DAUGHTER CARD, ABACUS
1 5W396 MODULE, INFORMATION, INTERNAL NIC, ABACUS
1 D4392 MODULE, COMPACT DISK READ WRITE/DIGITAL VIDEO DISK DRIVE COMBO, 24X, Quanta Storage Inc, ABACUS
1 G1110 SERVICE INSTALL MODULE, SOFTWARE, WINDOWS XP, INSPIRON, 5150
1 R2684 MODULE, SOFTWARE, PAINT SHOP PHOTO ALBUM, 4.0, STANDARD, ENGLAND/ENGLISH, DELL AMERICAS ORGANIZATION
1 Y0630 MODULE, COMPACT DISKETTE, PORTABLE RESOURCE CD, W/TOOLS, 5150
1 H2303 MODULE, SOFTWARE, CYBERLINK, 4.0.14H
1 K2201 MODULE, SOFTWARE, DELL MEDIA MANAGER, INSPIRON
1 7W750 MODULE, SOFTWARE, DOTNET, Framework
1 R1594 MODULE, SOFTWARE, DELL SUPPORT, GENERIC, INSPIRON
1 90729 MODULE, SOFTWARE, INFORMATION, NEW TECHNOLOGY FILE SYSTEM
1 D0563 MODULE, SOFTWARE, INTERNET SERVICE PROVIDER, AOL9.0, DELL AMERICAS ORGANIZATION, ASSET RECOVERY BUSINESS
1 W3213 MODULE, SOFTWARE, NORTON INTERNET SECURITY, 90DAY, ORIGINAL EQUIPMENT MFGR., ENGLAND/ENGLISH, INSPIRON
1 R2697 MODULE, SOFTWARE, PAINT SHOP PRO, TRY AND BUY, 8.0, ENGLAND/ENGLISH, DELL AMERICAS ORGANIZATION
1 F3346 MODULE, COMPACT DISKETTE, DELL-APPS, DELL AMERICAS ORGANIZATION, INSPIRON
1 G1442 MODULE, SOFTWARE, REALONE PLAYER, V9, BASIC
1 K4514 MODULE, SOFTWARE, WKS-STE2K4, ORIGINAL EQUIPMENT MFGR., INSPIRON
1 R4244 MODULE, SOFTWARE, ROBINSON NUGENT, 7.3, LOW ENCRYPTION, INSPIRON
1 Y0690 SHIP GROUP, NOTEBOOK, UNITED STATES, 5150, DAO-MDS
1 83022 MODULE, INFORMATION, NO-FILLER, BOX, INSTALL
1 6U324 MODULE, KEYBOARD, UNITED STATES, ABCS/5150, DELL AMERICAS ORGANIZATION
1 J2327 MODULE, BATTERY, PRIMARY, 8C, SIMPLO, ABACUS


Compaq Presario R3220US specs (OS - Windows XP Professional):
Product Name
R3220US

US Product Number
PF134UA#ABA

Microprocessor
Intel Pentium 4 processor 2.8 GHz

Microprocessor Cache
512KB L2 Cache

Memory
512MB DDR SDRAM (2 x 256MB) at 333MHz

Memory Max
1280MB DDR SDRAM (1 x 256MB, 1 x 1024MB)

Video Graphics
ATI MOBILITY RADEON 9000 IGP

Video Memory
128MB DDR (shared)

Hard Drive
40GB (4200RPM) Hard Drive

Diskette Drive
External USB Floppy Drive available for customers via hpshopping.com or local retailers; $50 off purchase price for US customers only (before taxes, shipping & handling) reimbursed via HP mail-in rebate.

Multimedia Drive
24X DVD/CD-RW Combo Drive

Display
15.4 inch WXGA High-Definition Widescreen (1280 x 800) Display

Fax/Modem
Integrated v.90/v.92 56KB modem (RJ-11 connector)

Network Card
Integrated 10/100BASE-T Ethernet LAN (RJ-45 connector)

Wireless Connectivity
54g 802.11b/g WLAN with 125HSM/SpeedBooster support

Sound
Internal speakers; JBL Pro Performance; AC audio link; volume control button and mute button

Keyboard
101-key compatible

Pointing Device
Touch Pad with On/Off button and dedicated vertical Scroll Up/Down pad

PC Card Slots

One Type I/II 32-bit card bus (also supports 16-bit)


External Ports

Three Universal Serial Bus (USB) 2.0
One Parallel SPP/ECP standard interface
One headphone-out
One microphone-in
One VGA (15-pin)
One TV-Out (S-video)
One RJ-11 (modem)
One RJ -45 (LAN)
One notebook expansion port


Dimensions
10.96 inches (L) (w/out hinge) to 11.18 inches (L) (w/hinge) x 14.25 inches (W) x 1.8 inches (H)

Weight
7.8 lbs

Security

Kensington MicroSaver lock slot
Power-on password
Accepts third party security lock devices


Power

120W AC adapter
Eight-cell Lithium-ion battery