Spanning hard drives

I've been reading up on this stuff, but I'm still confused.I have two hard drives (1TB and a 500GB) and the 500GB is broken up into 2 partitions. One partition is for my OS and the other is for random data and such. I would like to span the 1TB and the 500GB into one single hard drive.

Now for the problem...

How can I span the two drives?

BTW I'm using Windows 7 Home premium and I have Easeus Todo backup and partition master.

 

I believe RAID 0 would be a way to achieve this. I'm not experienced with RAID configurations, so all I can do is give you a reference. See http://en.wikipedia.org/wiki/Standard_RAID_levels

 

Sorry for the delay, I've been very busy. That sounds like a good idea, but it seems like it would be more of a hassle to set it up. I was reading something about dynamic drives and was wondering if I could use that. Any thoughts?