Alright, I was wanting to know if I could do a CLEAN install of windows 7 and keep like 3-4 folders of my stuff that I don't want to loose.

It's over 150 GB of stuff and I don't have an external hard drive is there anything I can do?

How many hard drives have your computer got?

Just one, it's a laptop dell inspiron 1525.

When you do a reformat of your 'C' (I assume you are using), all of the files will be purged on that hard drive.
If you haven't got a portable hard drive, or if your computer haven't got a second hard drive, you cannot save the files.

You could try to add the files into several .zip files and upload them to a hosting site.

Yeah.. But I don't have the greatest internet.. Uploading 150GB+ Would take weeks.

I would either try to reduce the map, and delete the unneeded the files, and try to upload the most important ones.
Or I would just ask a friend of mine IRL that has got a portable hard drive, and ask if I could lend it.

That's what I was thinking, and they're movies.. Quite a good collection too. :| Reason I wanna reinstall because I have a unknown driver casuing BSoD

When you get a BSoD, it usually says that the BSoD is caused by a program named ________.

Try to write down that name, and google "BSoD Windows 7 <Name of the program> Solution" or something similar, to find guides or such to fix the problem, might work as well.