Excel VBA question

I want to create a userForm that allows the user to choose three tab delimited files to be pasted in specific places in a spreadsheet. Here is an example of one of the pastes:

Code:

    Workbooks.OpenText Filename:= _
        [B]"\\some network folder\someFile.txt"[/B], Origin:= _
        xlWindows, StartRow:=1, DataType:=xlDelimited, TextQualifier:= _
        xlDoubleQuote, ConsecutiveDelimiter:=False, Tab:=True, Semicolon:=False, _
        Comma:=False, Space:=False, Other:=False, FieldInfo:=Array(Array(1, 1), _
        Array(2, 1), Array(3, 1), Array(4, 1), Array(5, 1), Array(6, 1), Array(7, 1), Array(8, 1), _
        Array(9, 1), Array(10, 1), Array(11, 1), Array(12, 1), Array(13, 1), Array(14, 1), Array(15 _
        , 1), Array(16, 1), Array(17, 1), Array(18, 1), Array(19, 1), Array(20, 1), Array(21, 1), _
        Array(22, 1), Array(23, 1), Array(24, 1), Array(25, 1))
    Range("A1:R16").Select
    Selection.Copy
    Windows("Book1").Activate
    ActiveSheet.Paste
    Windows("someFile.txt").Activate
    ActiveWorkbook.Close

I can use a textbox to replace the "\\some network folder\someFile.txt" if the user types in the file path directly, but I want the user to be able to browse for the file and I haven't been able to figure out how to do this.

I am only semi-competent in VBA, so be gentle with your solutions.

I am using Excel 2000 for this example, though I have 2003 at work where it will be running.

Any help would be appreciated.

Thanks.