Experince opencart developer to install payal extension

We are looking for an experienced opencart developer who can install the following - we have brought the following from opencart wesbite

1) http://www.opencart.com/index.php?route=extension/extension/info&extension_id=191&filter_search=paypal

2) Sliding cart we have gone for the below now
http://www.opencart.com/index.php?route=extension/extension/info&extension_id=2681&filter_search=sliding%20cart&page=2

We need someone who already has the experience and has done this before since these extensions are not easy to install and will give errors during installation so they must know who to install it and correct the errors

Only if you are confidant and have done this before then please contact us