Currently there is no way to know before downloading. Reason being is there's no way of seeing the download link location. (Using xbmc that is..)
Thanks CHI3f for that info about the reasoning some stuff doesn't work and some does. Thats makes sense now. It's somewhat odd in a way that if there's only one method to upload stuff to tintense that the creator of the download script is in relation to tintense, it would still have this effect, UNTIL i remembered it allows mirror download for locations which is what breaks it, so that explained that as well.
I wondered if that might be 1 of the reasons TeamBB wanted to do Marketplace from scratch, instead of borrowing off on the current one, is to assure that by having everything ONLY be able to download from 1 source only (there own), nothing would get broken that way.
OR, to play devils advokate, maybe the current script could possibly be modified to include checking default site, and if error's, accessing others if the default location doesn't work. If one can access and download the file just fine on the PC, then some link location is properly stored somewhere that could be retrieved and used in some manner with the script. Ah, just brainstorming, just got off a long day's work, and still in wired mode. I'll shut up now.
Either way, thanks for the explaination CHI3f!!! Whats next on your agenda? I like the classic BB skind you did, and the mods, as i really use Submenu items somewhat frequently, depending on what i'm doing. Have a good day.