Hi,
I have not had any luck searching for an answer to this problem.

I recently moved a project I've been working on from one hard drive to another, however when I load the application now, all of my custom comments and patches are gone.
It doesn't look like OllyDbg actually uses the "File" location stored in the UDD file, as even if I change it, it still won't load any of the additions I've made. (I also have a backup, just incase I corrupt it when modifying)
It isn't possible to simply use the old location, as I no longer have multiple partitions on this computer at present time.

Can somebody please point me to a solution for this problem?

if you have to old udd file...

make a new folder called udd move it to that folder

then enter ollydbg.. options .. UDD folder: xxxxxxxxxxxxxxxxx

edit xxxxx to the location of the folder you made