New account

OK so I bought the retail a few days ago and Ive had major problems with the email that NCsoft or Guildwars.com wants to solve but thats another matter, Anyway I intend to buy an account code from Plaync.com and I was just wondering if when I get the code,d o I have to use their client or can I just use the client from my retail version?

You should be able to use the client from the retail version just fine.