I own FS2004 with a all the patches etc plus a zillion addon aircraft mostly from this site and everything works brilliantly - thank you

Now before I go out and spend $70 on 'upgrading' to FSX I first decided to borrow a copy from a friend just to see if I like it etc.
Now during installation it asked me to 'activate' which I feel I cannot as it will clash with my friends copy and I dont want to land him in the lurch.
Now I installed the FSX Update SP1 but it would not allow me to install the FSX Acceleration Pack as it requires FSX to be 'activated' for that.
Now this is my problem.
Although I a have a fairly good PC system I find the FSX 'Plane' graphics to be VERY poor compared to the FS2004 'Plane' graphics, in fact it is shocking in comparison.
The new terrain, scenery, buildings and trees I see in FSX is absolutely magnificent compared to FS2004 so the graphics is working (6600GTS256)
I have tried the settings on Medium, High, the whole lot but still the edges of the planes are very ragged and looks quite terrible.
The other problem I have is I cannot get the 'Main' cockpit with the oprational guages, and can only see the Virtual Cockpit.
The 2 outside views seem ok except they are opposite to what they are in FS2004.
Now is this because my graphics card is not good enough, or is it perhaps because FSX is not 'activated' ?
If its due to activation, is there a temporary way around this so I can test FSX ?
Any help on this would be appreciated.