HOW TO FLY (Warning! in my game i'm playing with an aerodynamics config numbers exactly between that of 1.0 and 1.2.0 because i hate the 1.2.0 too much drag thing, and i thought 1.0 was fun but don't want to stray to far from "stock" personally i think squad should implement this best of both worlds config in the next patch as it would please many.* i have not tested this in the 1.2.0 configs, do so at your own risk!!!* lol)
CONTROLS: 1 toggles jets and rapiers, 2 toggles rapier mode, 3 toggles mainsail
1.first press x to turn throttle off, then press space activate all engines, but then press 3 to turn off the mainsail as you dont need that now lol
2.once thats done, full throttle and when your'e getting faster pitch up, it should take off around 130m/s
3.now your're airborne, pitch up to 45 degrees remain like this until 5000m, when you pitch down to 30 degrees, during this time you'll go supersonic.
4. as you get faster and get towards 10000m you need to pitch down to 20 degrees, and you will then really start gaining speed, then at 15000m pitch down to 10 degrees, and you will start cooking! nothing exploded when i flew this way so you should be fine.
5. remain at 10 degrees, by the time the airbeathers begin to die you will be around 1300 something m/s activate the rapiers mode (2) and mainsail (3) when you notice you are no longer gaining speed
6. just burn like this until desired apoapsis. (i tested it doing a 75x75 orbit. it is desgined for low orbit.) when desired apoapsis is reached, press 1 to turn off rapiers and turbojets. the mainsail is way more than enough for space. ( and more efficient)
7. circularize and release your payload!
8. de orbit burn will take only a second or two, do this as you will. (in low kerbin orbit i put my periapsis at 20000m, seems to be enough to get spaceplanes down without cooking.)
9. quickly before you enter the atmosphere you need to balance the tanks. you must put equal amounts of remaining oxidiser in the two most far end tanks marked by blue , and any remaining liquidfuel must go in the two 1.25 m liquidfuel tanks marked by red. there is probably more liquidfuel than this, so divide it between the 2 tanks just behind the ones i just mentioned, this is marked by pink. as in the included diagram 
10. as soon as you get below 70000m, pitch up 30 degrees and open airbrakes. holding this pitch while above 30000m won't make you flat spin and will slow you down enough so you dont cook when you enter below 30000m
11. when you gett below 1000m/s speed close the airbrakes, cooking won't be a problem anymore. then make a shallow dive to your landing, use the airbreathers to assist the glide if you start going to sloww and falling. hope you picked a reentry over land!
Have fun with it!