Quote from Afterdawn Forums:
Be careful with solderless modchips,because if the connection on the chip gets lost it could damage the console.I looked into a solderless solution for the PS2 called DMS EZI,and you wouldn't believe how many people had problems with it.Although a novice could solder one of the modchips currently in the Wii(except for the D2C chip install).It would be cool if you could swap out the chip though without desoldering/resoldering another one in.The only problem I have with them is the connections,every console I have seen that uses solderless modchips experiences a problem with the connections.To be honest I would like to see a softmod method like GCoS that was used on the GameCube,but instead for the Wii.It would be safe and you can implement everything available that the modchips already offer.
Link:
http://forums.afterdawn.com/thread_view.cfm/578073
Looks like solderless chips aren't without danger, i suggest you to (let) solder a chip in it, if you need to return your console to Nintendo (Or if you have another reason why the chip has to be removed) you can simply remove it by unsoldering it. I dunno if it's true, but my modder told me that he was willing to remove my D2PRO without any stuff leaving behind if it is required, he said that i could return it to Nintendo without the fear that they would be able to see that my Wii was once modded after he did so. If you can't solder it anyway i suggest using a WiiClip, and make sure to check all connections twice. Also make sure that you use some electrical tape or something to make sure that the WiiClip won't lose it's connection. I will have a look to see if a WiiClip (Eventually with a chip included) is available nearby you for not too much money, and will put it here if i found so.
EDIT: Look here:
http://www.ozmodchips.com/wiiclip-v4c-sold...wire-p-150.html A solderless WiiClip for $39.00, you can choose between this:
D2PRO presoldered on the clip + triwing which will be +$60.00
D2PRO presoldered but without triwing will be +$55.00
D2PRO sealed + triwing will be +$55.00
Only a D2PRO and no special stuff, you will need to solder it on the clip yourself, will be +$50.00
Or if you already have a 9-wire D2PRO it's just $39.00 and no extra stuff. Note that the options described above are $39.00 for the clip and the price after each option will be added to the $39.00. I have this chip myself (Soldered, not clipped) and i can really recommend it to you, you don't need to update it as it works directly with any game, also problemgames like Mario Kart Wii, Super Mario Galaxy and such. I hope this won't be too much money, i tried to find something for you, don't blame me if it's nothing usable please. I'm only trying to help you out.
Oh and by the way, i found this topic too last night while browsing the forums:
http://gbatemp.net/index.php?showtopic=80459
they're giving discount on a WiiClip with a D2ckey presoldered and a triwing, aka the full package. Jump over to the topic to find out more, dunno if it's something for you but thought it would maybe suit you.
Hope that helped you out in some way!