I have also thought of the entire update scheme and there is multiple ways I could do it. as with any program I could have it check a ftp site for a newer version automatically and prompt the user or maybe just toss in a random check sum that says there is an updated calc goto this link and download it. I see what your sayin that its easier to push updates through the site, and they both have their ups and downs and a update system would be a easy enough idea though I think, make it version based so if there is an update you can goto the page and download it if not you could continue using the current calc. I have a few ideas in my head that would be an easy way to do the updates. I could have it website based and on startup it checks the versions of the program, it would prompt you with a box to update or ignore, easy enough. add in a few error handling checks and your good to go. EDIT later tonight I will throw up a test site and test out my update idea to see if its actually feasible. On another note I will begin working on some more calculators for it today! I also really appreciate everyones input it makes me think more about certain ideas and tip it has been a GIANT help in the actual calculator creation. I will be giving the calc creators and tip it some recognition when my version is finished no matter what. thanks again and ill be keeping track of this forum all day today so if anyone has questions or ideas let me know!