I just got back from my wedding, hence why I havent replied to your email.
I second Roger's recommendation with Project Himalaya but I guess there are two avenues to which you can pursue climbing in the higher ranges.
Some have rocked up in Kathmandu and started climbing the trekking peaks and making contacts along the way. Others like myself have joined, semi-guided trips where, there is a main guide, but there is no-one with you all the way..if that makes sense.
Project Himalaya/Altitude Junkies, Summitclimb, Field Touring Alpine, DCXP, IMG plus numerous others all provide logistsics and permits for climbing. For additional fee, one can obtain additional services, like personal sherpa personal guide etc, oxygen etc. Depending on your comfort level, many people prefer to go with a Nepali company, to save costs. As a gross generalization, nepalis are usually stronger, with better organising of local logisitics. westerners on the other hand better in co-coordinating rescue (with international insurance etc) and understanding western clients concerns.
I'm always recommending alan arnette's site for some great information. You can see how Alan progressed from mountain to mountain and he rates his experiences with some of the expedition companies.
Just be aware, most of the 'guides' for these companies (I think IMG , the exception) are not certified guides in the European or North American sense. To the best of my knowledge Jamie McGuiness, Phil Crampton, Dan Mazur etc have an incredible amount of experience but are not 'certified'. Personally, this does not worry me in the least but North Americans and Europeans seem to sometimes be more concerned about this.
Hope this helps a bit. You may want to email some of the companies mentioned to get a feel for how they operate or alternately, start looking at Island Peak, Lobuche, Chulu West etc in Kathmandu, which you can do very independently. I have never been to Pakistan , so I cant offer and advice there.
Best of luck.