Fuzz, I don't know if you're interested or know but you could put your maps into SFX (Self Extracting) archives using something like WinRAR. Then people can extract it straight from the archive with a basic "installer" GUI. People can also rename SFX archives from exe to rar and use them as normal WinRAR archives, or vice versa as long as it was originally a SFX archive.
Could look like this..
That's a WinRAR SFX archive that's been edited, removed the logo (you could add your own) and moved the buttons etc around a little. You could modify the look of a SFX archive yourself with a PE program or just download the one from the pic here
http://ifile.it/l241q6r I've removed all the maps from it so it isn't over a gigabyte anymore and easier to download, and upload. It's only about 100KB now since it's basically an empty archive.
Yes it's an exe and many people might scream virus etc but if you don't trust it you can rename it to .rar open it with WinRAR to get an idea for you own, or just use it as a template and add your maps to it. It's very easy to change the text it displays, you'll catch on the moment you look at the "Comment" once opened in WinRAR.
I set up the folder structure in the SFX archive so it can be extracted straight into the UT3 installation folder, so all that has to be done is select that folder and click "install". I personally don't like the idea of maps and other space hogging game related things being stored in the documents folder, or anywhere else other than the game folder for that matter.
I also create a batch file that will remove the maps packs files, I left the .bat file inside the SFX archive so you could take a look at it (open with notepad) and edit it for you own so they can be easily removed, or just ignore/remove the bat file. To easily get a list of the files in your map pack so you can remove them with the bat file you could use the dir command in dosprompt (run > CMD) and use the command "dir /b/w/o/s/A-D" in the folder containing all your map pack files (obviously make sure the directory structure is correct, I'm sure you'll see what I mean)
Some people might say why not just use some free software to create an installer/uninstalled for your map pack, but this has the advantage of still being a normal WinRAR archive so there's no chance of incompatibility or problems some installers might have with certain opperating systems etc. It also means you can add things like a recovery record to the archive so it can be repaired if corrupted.
