Hi Peter,
In se38 report program we can change the selection text but i don't know sqvi this will work or not. go to se38 provide the your program name select the radio button text element and then display..
there is a tab selection text go to edit mode
and provide your test over there and save that will be displayed in your selection screen.. when ever execute that program..
go through this links too you may get some idea...
Change the description of a field in a SAP QUERY
http://ptgmedia.pearsoncmg.com/images/9780672329029/samplechapter/0672329026_CH03.pdf
http://scn.sap.com/thread/476502
SQ01 - need to change selection screen text of parameters
Thanks & Regards,
Srinivas.