InfoPath Dev

I have application where i am sending servey form to my clints as a attachment . but sum of my clint dont window system they are using  mac os and linux. i want the solution so that they also can view and submit the survey using Infopath.  

means i have to write number in tempalte.xml and send it . i am trying to this by unpacking .xsn and modify xml and again packing it . is thisright ?

How can i send a form by email when user can se te,plate.xml only in attachment not the complete .xsn file . please reply...

i have info path survey form which i am sending to my clint by attching it to mail. but i want survey form to be contain request number for which i am doing survey . how can set externaly any value inside form. ther is one fild request number inside form. i found that it can be done if i rename the .xsn file by request number and by reading file ...