Some great ideas there Fozz. Your doing the right thing having a play around first before you go for it.
It'd upto you about the stadiums, in my European Superleague, I didnt change the staduim cities, and had no problems.
As for uploading (dont forget to zip it), you can go straight to the download centre, and upload it there. Or try filefront.com, and link the file here.
Any probs, just get in touch with myself or fed.
Good luck!
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