Hi,
The problem does not come from HikaShop and I don't know why the label is not working correctly in IE8.
We do not use something tricky, it is just a label which is linked to the "input radio".
The "input radio" is hidden but you can display it. At this moment you can select the payment method using the radio.
You have to override the CSS in order to edit/add this rule:
.hika-radio input[type="radio"] {
display:block;
}
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.