After contacting Amadeus and Worldspan enquiring to use their GDS systems for checking flight avaliability, and fares, they said it was a requirement for me to be a member of either ABTA/TTA/ATOL/IATA.
Since im not part of any travel agency, is it still possible for me to become a member of one of these?

They said I could also become a "Sub-Agent" of a travel company, who provides my software for free and tickets the fares I want them to.
Can anyone explain this further, and tell me how I can become a "sub-agent", and any recommended companies?

Many Thanks!!!!