In a sense, the following might fit the specifications of the search:
R-MULTI 'Generation Lost' by Josh Temple - [Dld Date=07/15/2005] - [Dld Size=590kb] - [Dld Files=9] - [Status=Inactive]
If you did not care about the curse, the following would as well:
R-AA 'No Tendo' by Multiple - [Dld Date=07/11/2011] - [Dld Size=2881kb] - [Dld Files=357] - [Status=Not Complete]
If making a comprehensive list of appearances, you should include the following as well:
R-SGSG1 'Change of Body, Change of Mind' by KHnews hound - [Dld Date=04/19/2006] - [Dld Size=37kb] - [Dld Files=6] - [Status=Inactive]
R-SGSG1 'Had to be said' by Multiple - [Dld Date=06/25/2011] - [Dld Size=72kb] - [Dld Files=33] - [Status=Not Complete]
R-SGSG1 'Snake in the Horse's Shadow' by Lord Raa - [Dld Date=12/05/2010] - [Dld Size=209kb] - [Dld Files=11] - [Status=Not Complete]
R-SGSG1 'What Lies Beneath' by inverted helix - [Dld Date=12/08/2008] - [Dld Size=149kb] - [Dld Files=5] - [Status=Inactive]
It is also mentioned or used as sub plots in mutliple Ranma multicrossovers, just a few examples.
He makes a long distance transporter that is suspiciously like a stargate network in the following:
R-GD 'The Black Paw' by Ice-Tea-1983 - [Dld Date=07/25/2008] - [Dld Size=1555kb] - [Dld Files=47] - [Status=Complete]
Jack and company with Ranma/Senshi and OMG cast get involved late in game in following (wish he had continued this):
R-MULTI 'Ice Squared' by Lerris - [Dld Date=05/16/2006] - [Dld Size=570kb] - [Dld Files=15] - [Status=Inactive]
In a complete AU, Jack and Company get involved late in game in:
R-MULTI 'Ranma Forever' by The-Zorch - [Dld Date=05/31/2009] - [Dld Size=331kb] - [Dld Files=9] - [Status=Inactive]
Ina rather large multicross, late in story Jack and Company get saved by a Ranma whom has just crossed into the SG dimension at point Ori attack Earth.
R-MULTI 'The Goddess Dilemma' by Driver Jim Ohki - [Dld Date=07/14/2007] - [Dld Size=656kb] - [Dld Files=15] - [Status=Inactive]