Secondary class change (Factions)

I have guildwars factions only. Is there anyway to get a secondary class change. If so, how/where can I, and how many times can i do it.

Play the game. Get to Senji's Corner. Talk to Senji.

Yep what Onarik said, then Senji will charge you 500gp for each new secondary you select. Once you have bought the secondaries you can switch to any of them, as many times as you want, as long as you are in an outpost or town.

Krat

On the note of changing secondaries, where do you change them for NF? I beat it but never saw a place to change secondary profession.

Command Post. Gotta go outside the sunspear sanc. to get to it.

Oh so it is a quest that you get from Dunk or someone there?

its in the command post....the area just 'north' of the sunspear sanctuary. If you know where Zhed is and where Komir was there are 2 paragons right by that spot....one is for hero skills the other 2nd prof changer. (after you have completed some quests)

If you can go to the temple of balthazar, there are a couple guys on the first platform there that you can use to change.

Only as long as you are ascended, closer to the stars, or have beaten hunted! whichever is the correct one for your characters birth place.

...after you complete Building The Base: Prisoners Of War. Ya gotta rescue the guy first. Most of the service NPCs in Command Post are only added after finishing Building The Base quests.