there have been two versions in retail, the original sins dvd with vanilla sins version 1.0, but there was no galaxyforge for it,

and the sins of a solar empire trinity box that has vanilla sins 1.18/entrenchment 1.04/diplomacy 1.0 and can use the galaxyforge3 on the download page.

there is ONE method of modifying a map to work with the version 1.0 sins, which is edit the mapversion number to 0, NOTE this will NOT work with maps created for versions since entrenchment's release as the entire map structure changed which have the mapversion of 3.

harpo

would it work if i downloaded the 1.05 update?

You should do this no matter what, but you'd have to find the original galaxy forge (it has been updated three times) from another site somewhere. Really you should get impulse and update to the most recent version of Sins if that is possible, but otherwise that is your best bet.