Addon Overload?

Hello. I hope this is the right place for thisa and would appreciate some advice.
I recently installed a whole bunch of addons and now my FlightSim is sluggish to say the least. It sits on the loading screen for about 2-3 minutes before showing the main screen. The ATC voice is really crackly, which it never was before.
I have installed about 6 'Professional' aircraft, including the 3 big PMDG ones (big mistakes as they don't have tooltips) and the Level-D 767, both Zinertek products, and some others like FSBuild (Great App), Just Traffic 2005 (also good), Flight Keeper and a couple others and the UK2000 Scenery package.
What should I do to make things right again whilst keeping the great addons I have? I have a pretty fast computer in my opinion so that can't be it, and I recently upgraded the RAM to 1GB. I could turn down some of the display settings in Flight Simulator itself, as they're all on 100% at the moment, but other help would be appreciated.
Thanks.
Hussein.
I recently installed a whole bunch of addons and now my FlightSim is sluggish to say the least. It sits on the loading screen for about 2-3 minutes before showing the main screen. The ATC voice is really crackly, which it never was before.
I have installed about 6 'Professional' aircraft, including the 3 big PMDG ones (big mistakes as they don't have tooltips) and the Level-D 767, both Zinertek products, and some others like FSBuild (Great App), Just Traffic 2005 (also good), Flight Keeper and a couple others and the UK2000 Scenery package.
What should I do to make things right again whilst keeping the great addons I have? I have a pretty fast computer in my opinion so that can't be it, and I recently upgraded the RAM to 1GB. I could turn down some of the display settings in Flight Simulator itself, as they're all on 100% at the moment, but other help would be appreciated.
Thanks.
Hussein.