your thread title should be more descriptive so people can help you better and yes if you visit
http://www.stuffplug.com and click DOWNLOADS section ; i'm not sure where the final version for 7.5 is at the moment, and large display pictures were buggy in the beta version
When you have correctly installed stuffplug, open a conversation window and type in:
/xspoptions (and press enter/return - this will bring up the prefernces)
alternatively to access the preferences go to Plus > Plugins > Stuffplug options, either of these methods will bring up the prefernces for stuffplug...
go to general and tick "enable oversized display pictures"
Upload a DP in the usual way and edit your options to the size you want.