I have successfuly sync my old wallet which took me many days.but in the end i found few hours solution that was thought to be not feasible. To sync old wallet do following steps.

1-Backup your old wallet.
2-Delete all files from appdata/romming/zcoin .Entire folder (do take backup of your old wallet)
3-New start zcoin with new fresh wallet.
4-close the wallet as soon as it creates new wallet data in  appdata/romming/zcoin.
5- Download Block chain from : http://znode.io/ Extract two files of "blocks" and "chainstate" and replace them with folders of  "blocks" and "chainstate"(The wallet you just created) in appdata/romming/zcoin .
6-Now restart wallet.it will take some time to sync.it took me 8-10 hours to sync.
7-New as soon as new wallet opens.Backup the New wallet "wallet.dat" and copy receiving zcoin address to send coins from your old wallet to this very new one.
8-Now close wallet and copy old zcoin "wallet.dat" file and replace it with new one (or just simply delete new after taking backup and paste old).
9-Now restart wallet.It will rescan and will take few minutes or just one hr aprox to sync.
10-Now when wallet opens with your old wallet coin.simply send them to new wallet .
11-Get rid of old wallet .as it may create problems in future for you.


Don't forget to say thanks if it works.
Note :(Always backup & encrypt your wallet with password)