when I try to import a bunch of m2t files which are about 30-50 MB each, I get this:

Sony Vegas Pro 8.0
Version 8.0b (Build 217)
Exception 0xC0000005 (access violation) READ:0xFFFFFFF8 IP:0x77439B3D
In Module 'ntdll.dll' at Address 0x773D0000 + 0x69B3D
Thread: GUI ID=0xF00 Stack=0x10A000-0x130000
Registers:
EAX=00000000 CS=001b EIP=77439b3d EFLGS=00010206
EBX=0000321a SS=0023 ESP=0010a27c EBP=0010a354
ECX=00000000 DS=0023 ESI=00100000 FS=003b
EDX=02d800c4 ES=0023 EDI=02d84670 GS=0000
Bytes at CS:EIP:
77439B3D: 8B 41 F8 89 85 50 FF FF .A...P..
77439B45: FF 8B 55 E0 8B 72 4C 85 ..U..rL.


I upped my vegas/options/prefs/video ram to 512 MB as I have 4 GB system ram but still no good.
I have imported about 25 files so far and cant do any more. I import them into ALL media, then cut N paste in to individual bins under that directory in project media. I call each bin according to tape name so I can track them.
I used HDVSplit to digitize. I have a 10000rpm system drive and Vegas temp folder set to a non C:/ drive
I have separate 400 Gb drives for media, separate to projects drive.