Title says it all. The last time i played oblivion the instalation of the fighters stronghold made the magic shop in the imperial city unaccessable with the previously installed wizards tower, now that skyrim is coming out I want to do a few characters in oblivion, is there a way to fix this, or has it been fixed?

Just break into it, Guards don't come in after you, And you can take whatever you want from the shop.

how will i buy spells/items from the shopkeepers?