Ok everyone - here is a brief tutorial on what you need to do to you avi files to prevent having to redownloading them. You will need to have winrar and
torrentzip. The version of torrent zip I got was the win version. I unzipped the exe file into c:\documents and settings\[username]\Send To\ folder
You need to go into each of the avi folders, select all the avi files (ctrlr-A selects all files, then hold the ctrlr button and click on the txt file to unselect it)
Right click on the selected files and choose Add to Archive... (under winrar)
Compression method can stay as Normal
Select .ZIP format in the General Tab
I also selected delete files after archiving as I already had a copy of them elsewhere
Select Put each file to seperate archive in the Files Tab
Click OK
This will then produce individual zip files for each avi. Do this for each folder but remember not to zip the txt file as it's not required.
Once this is all done, right click on the main folder which has MAME098 #-0 and MAME098 A as subfolders
Select Send To - trrntzip.exe (or if you called it different)
This will then do a thorough check and rezip of all the files
and now your set will be exactly the same as mine.
Any problems just post here - remember you won't have to redownload anything if you have kept the original structure and followed the instructions above