I downloaded the same paint scheme as you charl, looks wounderful!
I took it for one flight, NZCH-NZWN. during taxi I considerd chucking it in cos I had stuters and teribly low fps (5-8) and my sim just looked absolutly terrible, at least the aircraft looked prety

I decieded to continue but during climbout my nose gear didnt retract.
Not likeing the idea of going along at M072, FL210 I jsut fly a big circut around NZCH and landed again, I put the nose down at the slow speed of 80kias and it promptly sunk into the runway! "crash"
I also found it will often rear up (like a big elephant) when you start a flight and you get the "crash".
Before you delete it charl look in the 74sp's panel folder do yo uhave a mdl file called "OS747SP.mdl" whereas the .mdl in the model folder is called OS747SP_JT9D.mdl. Hmm intersting lol
James