Postgres Start up Error

Dear all,

Today I by mistake deleted all the contents of pg_log & pg_xlog
directory and my Postgresql refuses to start due to the below error :-

2011-04-18 10:51:39 ISTLOG:  database system was interrupted; last known
up at 2011-04-18 10:06:42 IST
2011-04-18 10:51:39 ISTLOG:  could not open file
"pg_xlog/000000010000000600000007" (log file 6, segment 7): No such file
or directory
2011-04-18 10:51:39 ISTLOG:  invalid primary checkpoint record
2011-04-18 10:51:39 ISTLOG:  could not open file
"pg_xlog/0000000100000005000000C9" (log file 5, segment 201): No such
file or directory
2011-04-18 10:51:39 ISTLOG:  invalid secondary checkpoint record
2011-04-18 10:51:39 ISTPANIC:  could not locate a valid checkpoint record
2011-04-18 10:51:39 ISTLOG:  startup process (PID 11021) was terminated
by signal 6: Aborted
2011-04-18 10:51:39 ISTLOG:  aborting startup due to startup process failure

I try to reinstall with the same previous data directory, but it fails
again.

Any suggestions to solve it without losing the previous data.


Thanks & best Regards,
Adarsh Sharma