XP -> 7 upgrade gives me copying files problems...

I run my system on two partitions, one had XP and one 7 Beta. When i installed 7 RC1 i upgraded the XP install. This put all my files into a "windows.old" folder. All very well so far. All the files in this i can happily copy/cut and paste anywhere.
Except the files in My Music. This is a problem as i have a few 100 folders in there(each artist has a folder). The only way i can move (or even look in) them is to take ownership, which involves quite a lengthy clicking through dialogues. Fine for 1 folder, not for 300. I have tried running explorer in admin mode, in safe mode, whilst logged in as administrator (can i be admin any more times?!) to no avail. I get the dialogue:

"You need permission to perform this action.
You require permission from Jamie-PC\Jamie to make changes to this folder."

Oddly, Jamie-PC\Jamie is the user im using...

Im way too lazy to spend 2 hours doing each file individually so please come up with another way :) Thanks, Jamie

EDIT - SOLUTION!

Whilst writing this i had a brainwave - the user on my beta install had the same name. So i booted into the beta instead, and happily copied all my files over. As there's no feedback button any more im not sure how to report this quite large flaw, so feel free to suggest a way to do that. It's clearly not right as is, what if i had wiped my old install, as you usually would after installing a new OS...

Thanks, as you can see up there i found my own way round :) still a pretty big bug though :P

Hah, microsoft should employ people from here :)