csv file field needs to be changed current system date with awk

Shell Programming and Scripting
1

HI,

I have csv file with records as shown below.

4102,Bangalore,G10,21,08/17/2011 09:28:33:188,99,08/17/2011 09:27:33:881,08/17/2011 09:27:39:22,1580807561,404450302456086,919740330452,3553100467504101,2,NULL,NULL,Ericsson-South_Central,122.170.0.129,airtelgprs.com,404,45,16274,255,443,223.177.40.84,74.125.236.81,443,881,67,3522,2210,11,12,1,1,870,2284,5141,0,443,1,5,1580807561,NULL,NULL,NULL,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL,27043,NULL,

here fifth $5 field is some date and time say 08/17/2011 09:28:33:188

i want to change that field with current system date and time for all the records.ate time is
say current system date 08/18/2011 15:14:57:188

any thought with awk ?

Thanks,
Raghavendra

2 
awk -v dat=$(date +%d/%m/%Y) -v tim=$(date +%H:%M:%S) '{$5=dat" "tim}1' FS=, file

Guru.