i take it the car is an insurance write off, what category is the car, C or D?
did you get the V5 or the old MOT with it?
to replace the crossmember you'd be better off hiring a spot welder as they do the job really fast, HSS do them. i just hired one last saturday, cost me £53 for the day and i replaced an inner wing in about 20 minutes with it. so much better than faffing around with my mig.
you will really need to get the car a new MOT after you've fixed it and if the car is a category C write off you will need to MOT it then take it to VOSA for a VIC check (£36)
you cannot apply for a new V5 or tax a cat C car until it has passed the VIC check.
i've just rebuilt the front on a cat C pug 406, finished putting it back together on sunday, MOT'd it wednesday and got it VIC checked this morning followed by a trip to the local DVLA office to tax it and apply for the log book.
i got lucky and bought a pair of 406's for £220, one had a rear prang so i managed to get every front part i needed, all original parts.
even better was this afternoon when i weighed in the parts car and got £110 from the scrappy.