A few questions...

[Corbald]

So, I'm having a hell of a time completing two self-set objectives...

1) I need to lift 100+ KMU of fuel into a low orbit. Something just above atmo' will do just fine, but my computer can't handle the computations needed to keep the ship from ignoring little things like struts and linkages.. Any advice here? (I would prefer to avoid the use of the Orbital Construction mod, but if I can't, keep in mind that I'll be loading the Delivery/Construction lifter with the equivalent mass for whatever I'll be 'Constructing')

2) I know that if you want to alter the ... er... rotational speed (?) of a ship, you alter the orbital altitude, but which way? If I thrust prograde, I'm speeding up, but I'm also increasing the diameter of my orbit, making my ship take longer to complete an orbit... So, if I have one ship in a parking orbit at 200km, and another that I START at 200km, which way would I thrust to make the second ship move FASTER around the planet than the parked ship?

[Ekku Zakku]

I can't help with #1, but there is a "how to make KSP run faster" thread in this How To forum if you want to look at that (I haven't as I don't need it lol).

As for #2, if you want to orbit around a body faster, you take a lower orbit. This is key for orbital rendezvous; if you launch behind another craft (say, a space station), you'll want to hold a temporary orbit about 5 km or so below the target (depends on how far behind you are and how quickly you want to catch up). Then as you start to catch up, you can either just slowly raise your orbit closer, or use one of those charts that are around to determine the exact burn time to raise your Apoapsis to match the target.

Of course, a higher orbit is a useful way to slow down so your target can catch up =3

[EndlessWaves]

A 100ton payload shouldn't be too taxing, what sort of part count are you after?

[Corbald]

Well, the payload it's self is running around 70 parts. It's intended to be a heavy use station, so I loaded it down with everything I might need. Fuel (and fuel transfer), docking ports, etc...

@Ekku: I'll take a look at that thread, and thanks for clearing up my confusion on the orbit issue.

[EndlessWaves]

Well, the payload it's self is running around 70 parts. It's intended to be a heavy use station, so I loaded it down with everything I might need. Fuel (and fuel transfer), docking ports, etc...

That's a completely different thing, 100 tons of fuel and a capsule is 7-9 parts so relatively easy to get into space smoothly. Another 60-odd parts is a much harder challenge. What's the total payload weight?